![]() "Harvesting wild seaweed is not an option because soon we would deplete the oceans and cause an ecological problem." "To be used as a feed additive on a large scale, the seaweed would have to be cultivated in aquaculture operations," he said. Even to provide it as a supplement to most of the United States' 94 million cattle is unrealistic. With nearly 1.5 billion head of cattle in the world, harvesting enough wild seaweed to add to their feed would be impossible. If seaweed feed supplement is a viable option to make a difference globally, the scale of production would have to be immense, Hristov noted. ![]() "It looks promising, and we are continuing research." " Asparagopsis taxiformis - a red seaweed that grows in the tropics - in short-term studies in lactating dairy cows decreased methane emission by 80 percent and had no effect on feed intake or milk yield, when fed at up to 0.5 percent of feed dry-matter intake," said Alexander Hristov, distinguished professor of dairy nutrition.
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